Secret Missions of the X-37B

This video is a compilation of military experts speculating on the X-37B space plane.

The Boeing X-37, also known as the X-37 Orbital Test Vehicle (OTV), is an American reusable unmanned spacecraft. The X-37 began as a NASA project in 1999, before being transferred to the U.S. Department of Defense in 2004. / Wikipedia

Photo: US Airforce, Wikimedia Commons